mirror of https://github.com/FFmpeg/FFmpeg.git
Stefano Sabatini
12 years ago
parent
e39f6a3a5c
commit
39a8275fdf
5 changed files with 114 additions and 230 deletions
@ -1,188 +0,0 @@ |
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/*
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* Copyright (c) 2010 Stefano Sabatini |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file |
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* color source |
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*/ |
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#include "avfilter.h" |
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#include "formats.h" |
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#include "internal.h" |
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#include "video.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/colorspace.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/mathematics.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/parseutils.h" |
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#include "drawutils.h" |
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typedef struct { |
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const AVClass *class; |
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int w, h; |
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char *rate_str; |
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char *color_str; |
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uint8_t color_rgba[4]; |
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AVRational time_base; |
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uint64_t pts; |
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FFDrawContext draw; |
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FFDrawColor color; |
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AVFilterBufferRef *picref; ///< cached reference containing the painted picture
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} ColorContext; |
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#define OFFSET(x) offsetof(ColorContext, x) |
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static const AVOption color_options[]= { |
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{ "size", "set frame size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0 }, |
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{ "s", "set frame size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0 }, |
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{ "rate", "set frame rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0 }, |
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{ "r", "set frame rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0 }, |
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{ "color", "set color", OFFSET(color_str), AV_OPT_TYPE_STRING, {.str = "black"}, CHAR_MIN, CHAR_MAX }, |
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{ "c", "set color", OFFSET(color_str), AV_OPT_TYPE_STRING, {.str = "black"}, CHAR_MIN, CHAR_MAX }, |
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{ NULL }, |
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}; |
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AVFILTER_DEFINE_CLASS(color); |
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static av_cold int color_init(AVFilterContext *ctx, const char *args) |
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{ |
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ColorContext *color = ctx->priv; |
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AVRational frame_rate_q; |
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int ret = 0; |
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color->class = &color_class; |
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av_opt_set_defaults(color); |
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if ((ret = av_set_options_string(color, args, "=", ":")) < 0) { |
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av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args); |
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goto end; |
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} |
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if (av_parse_video_rate(&frame_rate_q, color->rate_str) < 0) { |
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av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", color->rate_str); |
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ret = AVERROR(EINVAL); |
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goto end; |
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} |
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if (av_parse_color(color->color_rgba, color->color_str, -1, ctx) < 0) { |
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ret = AVERROR(EINVAL); |
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goto end; |
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} |
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color->time_base.num = frame_rate_q.den; |
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color->time_base.den = frame_rate_q.num; |
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end: |
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return ret; |
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} |
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static av_cold void color_uninit(AVFilterContext *ctx) |
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{ |
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ColorContext *color = ctx->priv; |
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av_opt_free(color); |
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avfilter_unref_bufferp(&color->picref); |
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} |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0)); |
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return 0; |
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} |
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static int color_config_props(AVFilterLink *inlink) |
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{ |
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AVFilterContext *ctx = inlink->src; |
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ColorContext *color = ctx->priv; |
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ff_draw_init(&color->draw, inlink->format, 0); |
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ff_draw_color(&color->draw, &color->color, color->color_rgba); |
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color->w = ff_draw_round_to_sub(&color->draw, 0, -1, color->w); |
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color->h = ff_draw_round_to_sub(&color->draw, 1, -1, color->h); |
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if (av_image_check_size(color->w, color->h, 0, ctx) < 0) |
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return AVERROR(EINVAL); |
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av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d r:%d/%d color:0x%02x%02x%02x%02x\n", |
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color->w, color->h, color->time_base.den, color->time_base.num, |
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color->color_rgba[0], color->color_rgba[1], color->color_rgba[2], color->color_rgba[3]); |
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inlink->w = color->w; |
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inlink->h = color->h; |
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inlink->time_base = color->time_base; |
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return 0; |
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} |
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static int color_request_frame(AVFilterLink *link) |
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{ |
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ColorContext *color = link->src->priv; |
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AVFilterBufferRef *buf_out; |
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int ret; |
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if (!color->picref) { |
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color->picref = |
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ff_get_video_buffer(link, AV_PERM_WRITE|AV_PERM_PRESERVE|AV_PERM_REUSE, |
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color->w, color->h); |
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if (!color->picref) |
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return AVERROR(ENOMEM); |
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ff_fill_rectangle(&color->draw, &color->color, |
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color->picref->data, color->picref->linesize, |
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0, 0, color->w, color->h); |
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color->picref->video->sample_aspect_ratio = (AVRational) {1, 1}; |
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color->picref->pos = -1; |
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} |
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color->picref->pts = color->pts++; |
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buf_out = avfilter_ref_buffer(color->picref, ~AV_PERM_WRITE); |
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if (!buf_out) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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ret = ff_start_frame(link, buf_out); |
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if (ret < 0) |
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goto fail; |
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ret = ff_draw_slice(link, 0, color->h, 1); |
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if (ret < 0) |
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goto fail; |
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ret = ff_end_frame(link); |
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fail: |
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return ret; |
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} |
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AVFilter avfilter_vsrc_color = { |
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.name = "color", |
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.description = NULL_IF_CONFIG_SMALL("Provide an uniformly colored input."), |
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.priv_size = sizeof(ColorContext), |
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.init = color_init, |
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.uninit = color_uninit, |
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.query_formats = query_formats, |
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.inputs = (const AVFilterPad[]) {{ .name = NULL}}, |
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.outputs = (const AVFilterPad[]) {{ .name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.request_frame = color_request_frame, |
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.config_props = color_config_props }, |
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{ .name = NULL}}, |
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}; |
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